GF_ANGLE_PI2      127 src/utils/math.c 		theta = 2 * GF_ANGLE_PI2;
GF_ANGLE_PI2      429 src/utils/math.c 	while ( theta <= -GF_ANGLE_PI2 ) {
GF_ANGLE_PI2      435 src/utils/math.c 	while ( theta > GF_ANGLE_PI2 ) {